IEEE Test Procedure for Airborne Sound Measurements on Rotating Electric Machinery

This test procedure defines approved methods for conducting tests and reporting results to effect the uniform determination of rotating electric machine sound under steady-state conditions with an accuracy of +or-3 dB tested in three acoustical environments. These are: free field; reverberant field; and semireverberant field. This procedures assumes the presence of pure tones or the predominance of discrete frequencies in the sound spectrum.<
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